Numerical Study of the Interplay of Monomer-Surface Electrostatic and Non-electrostatic Interactions in the Adsorption of Weak Polyelectrolytes on Oppositely Charged Surfaces

Hai-ming Li; Yu-wei Chen; Yue-jin Zhu; Chao-hui Tong

doi:10.1007/s10118-016-1780-x

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Numerical Study of the Interplay of Monomer-Surface Electrostatic and Non-electrostatic Interactions in the Adsorption of Weak Polyelectrolytes on Oppositely Charged Surfaces

PAPERS | Updated：2021-05-12

- Numerical Study of the Interplay of Monomer-Surface Electrostatic and Non-electrostatic Interactions in the Adsorption of Weak Polyelectrolytes on Oppositely Charged Surfaces
- Chinese Journal of Polymer Science Vol. 34, Issue 5, Pages: 552-562(2016)
- Affiliations：
  
  Department of Physics, Ningbo University, Ningbo 315211, China
- Author bio：
  
  Chao-hui Tong (童朝晖), E-mail: tongchaohui@nbu.edu.cn
- Funds：
- DOI：10.1007/s10118-016-1780-x
  CLC：
- Received：30 October 2015，
  
  Revised：2015-12-17，
  
  Accepted：03 January 2016，
  
  Published：2016-05
- Accepted：
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Hai-ming Li, Yu-wei Chen, Yue-jin Zhu, et al. Numerical Study of the Interplay of Monomer-Surface Electrostatic and Non-electrostatic Interactions in the Adsorption of Weak Polyelectrolytes on Oppositely Charged Surfaces[J]. Chinese Journal of Polymer Science, 2016, 34(5): 552-562.
DOI：

Hai-ming Li, Yu-wei Chen, Yue-jin Zhu, et al. Numerical Study of the Interplay of Monomer-Surface Electrostatic and Non-electrostatic Interactions in the Adsorption of Weak Polyelectrolytes on Oppositely Charged Surfaces[J]. Chinese Journal of Polymer Science, 2016, 34(5): 552-562. DOI： 10.1007/s10118-016-1780-x.

摘要

Abstract

The adsorption of weak polybase on oppositely charged planar surfaces has been investigated numerically by using the self-consistent field theory (SCFT). Particular attention was paid to the interplay of monomer-surface electrostatic and non-electrostatic interactions in the adsorption behaviors of weak polybase. In this study

the strength of monomer-surface non-electrostatic interactions was set to be no more than the thermal energy

. It was found from the numerical study that in the regime of low surface charge density of the substrate and low pH or high bulk degree of ionization

both the screening-enhanced and screening-reduced salt effects emerge. On the contrary

in the opposite regime

only the screening-reduced salt effect was observed. Moreover

the overall charge neutrality inside the adsorption layer was analyzed. The underlying mechanism governing the adsorption behaviors of weak polybase on oppositely charged surfaces was elucidated.

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Keywords

references

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